<template>
  <div class="login">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">欢迎登录后台管理系统</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon"/>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon"/>
        </el-input>
      </el-form-item>
      <el-form-item prop="code">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon"/>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img"/>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;height: 55px;font-size: large;"
          @click.native.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2020-2021 G2 All Rights Reserved.</span>
    </div>
  </div>
</template>

<script>
  import {captcha, login} from '@/api/api'
  import utils from '@/utils/utils';
  import {setToken} from '@/utils/auth'

  export default {
    name: "Login",
    data() {
      return {
        codeUrl: "",
        cookiePassword: "",
        loginForm: {
          username: "admin",
          password: "123456",
          rememberMe: false,
          code: "",
        },
        loginRules: {
          username: [{required: true, trigger: "blur", message: "用户名不能为空"},
            {min: 2, max: 20, message: '用户名长度在 2 到 20 个字符之间', trigger: 'blur'}],
          password: [{required: true, trigger: "blur", message: "密码不能为空"},
            {min: 6, max: 20, message: '密码长度在 6 到 20 个字符之间', trigger: 'blur'}],
          code: [{required: true, trigger: "change", message: "验证码不能为空"},
            {min: 1, max: 6, message: '验证码长度在 1 到 6 个字符之间', trigger: 'blur'}],
        },
        loading: false,
      };
    },
    watch: {
      $route: {
        handler: function (route) {
          this.redirect = route.query && route.query.redirect;
        },
        immediate: true
      }
    },
    created() {
      this.getCode();
    },
    methods: {
      getCode() {
        captcha().then(res => {
          this.codeUrl = "data:image/jpg;base64," + res.data;
        });
      },
      handleLogin() {
        this.loading = true
        this.$refs.loginForm.validate(valid => {
          if (!valid) {
            this.showTips = true;
            this.loading = false
            this.message = '验证不通过，请检查输入项！';
            return false;
          }
          // 密码进行MD5加密
          this.loginForm.password = utils.MD5(this.loginForm.password)
          login(this.loginForm).then((res) => {
            setToken(res.data)
            this.$router.push({path: '/'})
          }).catch(()=> {
            this.loginForm.password = ""
            this.loginForm.code = ""
          }).finally(() => {
            this.loading = false
            this.getCode()
          })
        })
      }
    }
  };
</script>

<style rel="stylesheet/scss" lang="scss">
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url("../assets/images/login-background.jpg");
    background-size: cover;
  }

  .title {
    margin: 10px auto 30px auto;
    text-align: center;
    color: #707070;
  }

  .login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;

  .el-input {
    height: 45px;

  input {
    height: 45px;
  }

  }
  .input-icon {
    height: 45px;
    width: 16px;
    margin-left: 2px;
  }

  }
  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }

  .login-code {
    width: 33%;
    height: 43px;
    float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }

  }
  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }

  .login-code-img {
    height: 43px;
  }
</style>
